When Load is called with a run number, then the input file is ignored
  until a line with a list of run numbers or run number ranges is found.
  For example:
     44,50-90,113
  If the run number matches one of these run numbers or ranges,
  parameter definitions after the match are loaded.  (Until the next
  list of run numbers and ranges.)
  Before this commit, only a single run number or a single range of
  run numbers was allowed.